• Register Today It's free! This box and some ads will disappear once registered!

^^Searches ExplorerForum.com^^

Ping time again!

Bwana Bob

Well-Known Member
Joined
February 2, 2002
Messages
759
Reaction score
5
City, State
Morris Plains, NJ
Year, Model & Trim Level
92 XLT
I can always tell when it' autumn and they change over to winter blend fuel. My Ex starts pinging. I do the Seafoam or Techron treatment regularly and she was fine all summer. Here in NJ they use the reformulated/oxygenated fuel.

Engine is the 4.0 L OHV. Trans is 5-speed stick. Diff is 3.27.

I've switched up to 89 octane but she still pings on the highway at certain rpms.

I've read all the threads on this subject but it seems to be a seasonal issue now. Should I just pull the "Octane plug" until spring or use octane booster?

BTW I'm running Autolite plugs. Some say that the OHV likes Motorcraft plugs better. Would plugs make a difference?

Thanks.

Bob
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month "try out" option.

Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private conversations, and more. Join Today. Your support is greatly appreciated.








vitb

New Member
Joined
September 5, 2007
Messages
4
Reaction score
0
City, State
albuquerque
Year, Model & Trim Level
94 xlt
I have a 94 Explorer, 4L V6, with 145K miles I had a similar problem but in the summer, not fall. Car knocked horribly under load (but no CEL). Engine got real hot & no power as a result. No fun at all.
Tried all the ideas here - higher octane gas, octane plug, sea foam, fuel pressure, plugs, MAF cleaning, you name it. Then I changed the air intake temp sensor (about $10) because it seems to like the cold weather better. Problem largely went away, and its been running good, up & down the rockies since then. It's a $10 experiment and the sensor is easy to replace. Hope this helps.
 




unclemeat

Explorer Addict
Joined
October 20, 2002
Messages
3,077
Reaction score
4
City, State
Richmond, VA
Year, Model & Trim Level
91 sport
Try burning off the carbon. Run high (4,000 plus) RPMS for about 10-minutes. Stick shifts dont always get up to high enough temp to keep the valves freee of carbon.
 




Bwana Bob

Well-Known Member
Joined
February 2, 2002
Messages
759
Reaction score
5
City, State
Morris Plains, NJ
Year, Model & Trim Level
92 XLT
I have a 94 Explorer, 4L V6, with 145K miles I had a similar problem but in the summer, not fall. Car knocked horribly under load (but no CEL). Engine got real hot & no power as a result. No fun at all.
Tried all the ideas here - higher octane gas, octane plug, sea foam, fuel pressure, plugs, MAF cleaning, you name it. Then I changed the air intake temp sensor (about $10) because it seems to like the cold weather better. Problem largely went away, and its been running good, up & down the rockies since then. It's a $10 experiment and the sensor is easy to replace. Hope this helps.

Thanks, that's a good idea. I hadn't thought of the air temp sensor. It's the one on the intake manifold near the IAC servo, right?

Bob
 




Bwana Bob

Well-Known Member
Joined
February 2, 2002
Messages
759
Reaction score
5
City, State
Morris Plains, NJ
Year, Model & Trim Level
92 XLT
Try burning off the carbon. Run high (4,000 plus) RPMS for about 10-minutes. Stick shifts dont always get up to high enough temp to keep the valves freee of carbon.

Thank you, another good idea. I put Techron in the fuel, which seemed to help a little, but this week its jerking a bit so I filled the tank and put in a cocktail od Seafoan and Marvel Mystery Oil. I hope I don't have a clogged injector again. In the past, I had problems with Fram fuel filters failing and fouling the injectors, which takes several weeks to clear.

Bob
 




jd4242

Elite Explorer
Joined
October 15, 2008
Messages
10,785
Reaction score
286
City, State
va beach
Year, Model & Trim Level
92explorer&94 ranger
fram=crap!!
 




westfield

Well-Known Member
Joined
September 18, 2009
Messages
171
Reaction score
1
City, State
San Antonio, TX
Year, Model & Trim Level
94 Eddie Bauer
My 94 ex is pinging with the winter blend to...89 octane fixes it for me. By the way
jd4242's comment that fram=crap is shared on so many other forums. It is amazing that they have such a bad rep for filters yet still stay in business ! I won't use from either.
 




boggs1227

Explorer Addict
Joined
February 19, 2008
Messages
1,472
Reaction score
3
City, State
Flowery Branch , Georgia, 1994 sport 2wd auto
Year, Model & Trim Level
2005 colorado 2wd 5spd
none mentioned the lower intake being a possible cause of the ping .

mine did this ....pinged so bad sounded like a dam poping air hose ,found out that my lower intake was loose where it bolts onto the heads .the bolts were all most finger loose ......retourqed everything and no more problem .
 




Bwana Bob

Well-Known Member
Joined
February 2, 2002
Messages
759
Reaction score
5
City, State
Morris Plains, NJ
Year, Model & Trim Level
92 XLT
Yes, my experience with the Fram fuel filters has been horrible. They fail internally and dump dirt into the fuel injectors. When I remove the filter I can hear the element rattling around loose in the can.

I put in a Motorcraft filter from Advance Auto Parts for only a few dollars more than the Fram.

Truck is acting up again, jerking and bucking on the highway. I can't believe its the fuel filter again and it seems to be OK until it warms up, so I'm going to try vitb's suggestion and change the air charge temperature sensor.

Bob
 








jd4242

Elite Explorer
Joined
October 15, 2008
Messages
10,785
Reaction score
286
City, State
va beach
Year, Model & Trim Level
92explorer&94 ranger
i allways run higher octane or colder plugs,but ive never gotten a ping in a stock motor.check the lower intake bolts run high rpms and 89+ gas and if none of that works try ngk tr6 plugs gaped around .40.
 




Bwana Bob

Well-Known Member
Joined
February 2, 2002
Messages
759
Reaction score
5
City, State
Morris Plains, NJ
Year, Model & Trim Level
92 XLT
Can I get at the lower intake manifold bolts without pulling the valve covers?

It pings mostly after it warms up. Would it like Motorcraft plugs better than the Autolites that I'm running? After my bad experiences with Fram, I'm beginning to mistrust any auto part that Wal-Mart sells!

Thanks.

Bob
 




Anime

EF YEAH!!
Elite Explorer
Joined
November 6, 2000
Messages
5,441
Reaction score
37
Year, Model & Trim Level
2018 EX Sport Concept
The actual valvetrain ping/clatter seems to be from the wear and tear on the pushrods and rocker arms, when the wear gets bad enough, there's enough slack that it's actually a mechanical issue. The only solution is new rockers and pushrods.

You can get ping from the other things as mentioned, though, whether it's a leaky intake gasket, dirty MAF sensor, air temp sensor, etc.

Jerking and bucking is another issue, though. My truck's motor used to do that until I swapped the old stock wires for Magnecor's, so you might want to try a new set of plug wires, maybe with Motorcraft plugs, too. They do seem to make a difference versus the cheaper and even the more expensive plugs. Don't discount the other systems either, though. A dirty fuel filter or air filter might have something to do with it, a fuel pump that's on it's way out, or even bad gas. When I ran sam's club/murphy usa gas (with minimum detergents) for awhile, the engine would chug and buck on heavy acceleration. After a long time of running Chevron/Shell (top tier fuel with top spec detergents), it no longer bucks or gives any hesitation, ever. Now the only thing I have is loud valve clatter from the rocker/pushrod wear. If it's a really LOUD clatter, it's probably the rockers/rods. If it's lighter ping and bucking/knock/hesitation, try the other fixes first, since they are really good maintenance items to do anyway.
 




KobeJ05

Well-Known Member
Joined
March 8, 2009
Messages
439
Reaction score
0
City, State
Marina, CA
Year, Model & Trim Level
1994 explorer 157k miles
i hear a slapping or clicking sound in my engine in he front been like that for a long time. hope it aint my timing chain
 




Top